package com.atguigu.gulimall.order.service.impl;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.exception.NoStockException;
import com.atguigu.common.to.mq.OrderTo;
import com.atguigu.common.to.mq.SeckillOrderTo;
import com.atguigu.common.utils.R;
import com.atguigu.common.vo.MemberRespVo;
import com.atguigu.gulimall.order.constant.OrderConstant;
import com.atguigu.gulimall.order.entity.OrderItemEntity;
import com.atguigu.gulimall.order.entity.PaymentInfoEntity;
import com.atguigu.gulimall.order.enume.OrderStatusEnum;
import com.atguigu.gulimall.order.feign.CartFeignService;
import com.atguigu.gulimall.order.feign.MemberFeignService;
import com.atguigu.gulimall.order.feign.ProductFeignService;
import com.atguigu.gulimall.order.feign.WmsFeignService;
import com.atguigu.gulimall.order.interceptor.LoginUserInterceptor;
import com.atguigu.gulimall.order.service.OrderItemService;
import com.atguigu.gulimall.order.service.PaymentInfoService;
import com.atguigu.gulimall.order.to.OrderCreateTo;
import com.atguigu.gulimall.order.vo.*;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.script.DefaultRedisScript;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.util.*;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.gulimall.order.dao.OrderDao;
import com.atguigu.gulimall.order.entity.OrderEntity;
import com.atguigu.gulimall.order.service.OrderService;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;


@Service("orderService")
public class OrderServiceImpl extends ServiceImpl<OrderDao, OrderEntity> implements OrderService {

    private ThreadLocal<OrderSubmitVo> confirmVoThreadLocal = new ThreadLocal<>();
    @Autowired
    RabbitTemplate rabbitTemplate ;
    @Autowired
    MemberFeignService memberFeignService ;
    @Autowired
    CartFeignService cartFeignService ;
    @Autowired
    ProductFeignService productFeignService;
    @Autowired
    ThreadPoolExecutor executor ;
    @Autowired
    WmsFeignService wmsFeignService;
    @Autowired
    StringRedisTemplate redisTemplate ;
    @Autowired
    OrderItemService orderItemService;
    @Autowired
    PaymentInfoService paymentInfoService ;
    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<OrderEntity> page = this.page(
                new Query<OrderEntity>().getPage(params),
                new QueryWrapper<OrderEntity>()
        );

        return new PageUtils(page);
    }

    @Override
    public OrderConfirmVo confirmOrder() throws ExecutionException, InterruptedException {
        OrderConfirmVo confirmVo = new OrderConfirmVo();
        MemberRespVo memberRespVo = LoginUserInterceptor.loginUser.get();
        System.out.println("mian线程:"+Thread.currentThread().getId());

//        获取之前定的请求
        RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
        CompletableFuture<Void> getAddressFuture = CompletableFuture.runAsync(() -> {
            //每一个线程都来共享之前的请求数据
            RequestContextHolder.setRequestAttributes(requestAttributes);
            System.out.println("adress线程:"+Thread.currentThread().getId());
            //      1  远程查询所有的收货地址列表
            List<MemberAddressVo> address = memberFeignService.getAddress(memberRespVo.getId());
            confirmVo.setAddress(address);
        }, executor);
        CompletableFuture<Void> CartFuture = CompletableFuture.runAsync(() -> {
            RequestContextHolder.setRequestAttributes(requestAttributes);
            System.out.println("cart线程:"+Thread.currentThread().getId());
            //       2 远程查询购物车所有选择的购物项
            List<OrderItemVo> items = cartFeignService.getCurrentUserCartItems();
            confirmVo.setItems(items);
        }, executor).thenRunAsync(()->{
            List<OrderItemVo> items = confirmVo.getItems();
            List<Long> collect = items.stream().map(item -> item.getSkuId()).collect(Collectors.toList());
            R hasStock = wmsFeignService.getSkuHasStock(collect);
            List<SkuStockVo> data = hasStock.getData(new TypeReference<List<SkuStockVo>>() {
            });
            if(data!=null){
                Map<Long, Boolean> map = data.stream().collect(Collectors.toMap(SkuStockVo::getSkuId, SkuStockVo::getHasStock));
                confirmVo.setStocks(map);
            }
        },executor);
//      3  查询用户积分
        Integer integration = memberRespVo.getIntegration();
        confirmVo.setIntegration(integration);
      //4  //其他数据计算
      //TODO 5  //防重令牌
        String token = UUID.randomUUID().toString().replace("-", "");
        redisTemplate.opsForValue().set(OrderConstant.USER_ORDER_TOKEN_PREFIX+memberRespVo.getId(),token,30, TimeUnit.MINUTES);
        confirmVo.setOrderTooken(token);
        CompletableFuture.allOf(getAddressFuture,CartFuture).get();

        List<MemberAddressVo> address = confirmVo.getAddress();
        return confirmVo;
    }
    //@GlobalTransactional   //高并发
    @Transactional
    @Override
    public SubmitOrderResponseVo submitOrder(OrderSubmitVo vo) {
        SubmitOrderResponseVo response = new SubmitOrderResponseVo();
        MemberRespVo memberRespVo = LoginUserInterceptor.loginUser.get();
        response.setCode(0);
        confirmVoThreadLocal.set(vo);
        //下单去创建订单，验证令牌，验价格，锁库存
//        1、验证令牌【令牌的对比和删除必须保证原子性】
        //0令牌失败 1 删除成功
        String script = "if redis.call('get',KEYS[1]) == ARGV[1] then return redis.call('del',KEYS[1]) else return 0 end";
        String orderToken = vo.getOrderToken();
        //原子验证令牌和删除令牌
        Long result = redisTemplate.execute(new DefaultRedisScript<Long>(script, Long.class), Arrays.asList(OrderConstant.USER_ORDER_TOKEN_PREFIX + memberRespVo.getId()), orderToken);

        if(result == 0l){
//            fail
            response.setCode(1);
            return response ;
        }else {
//            令牌验证成功  下单、去创建订单    验令牌 验价格 锁库存
            //创建订单，订单项等信息
            OrderCreateTo order = createOrder();
            //验价
            BigDecimal payAmount = order.getOrder().getPayAmount();
            BigDecimal payPrice = vo.getPayPrice();
                if (Math.abs(payAmount.subtract(payPrice).doubleValue()) < 0.01) {
                    //金额对比

                    //保存订单
                    saveOrder(order);
                    //库存锁定,只要有异常回滚订单数据
                    //订单号，所有订单项（SkuId,skuName,num)
                    WareSkuLockVo lockVo = new WareSkuLockVo();
                    lockVo.setOrderSn(order.getOrder().getOrderSn());

                    List<OrderItemVo> locks = order.getOrderItems().stream().map(item -> {
                        OrderItemVo itemVo = new OrderItemVo();
                        itemVo.setSkuId(item.getSkuId());
                        itemVo.setCount(item.getSkuQuantity());
                        itemVo.setTitle(item.getSkuName());
                        return itemVo;
                    }).collect(Collectors.toList());
                    lockVo.setLocks(locks);
                    //TODO 远程锁库存
                    R r = wmsFeignService.orderLockStock(lockVo);
                    if (r.getCode() == 0) {
                        //锁成功le
                        response.setOrder(order.getOrder());
                        //TODO 远程扣减积分
//                        int i = 10 / 0;
                        //TODO 订单创建成功发送消息给MQ
                        rabbitTemplate.convertAndSend("order-event-exchange","order.create.order",order.getOrder());
                        return response;
                    } else {
                        String msg = (String) r.get("msg");
                        throw new NoStockException(msg);
                    }

                } else {
                    response.setCode(2);
                    return response;
                }
            }
        }

    @Override
    public OrderEntity getOrderByOrderSn(String orderSn) {
        OrderEntity order_sn = this.getOne(new QueryWrapper<OrderEntity>().eq("order_sn", orderSn));
        return order_sn;
    }

    @Override
    public void closeOrder(OrderEntity entity) {
        //当前这个账单的最新状态
        OrderEntity orderEntity = this.getById(entity.getId());
        if(orderEntity.getStatus() == OrderStatusEnum.CREATE_NEW.getCode()){
            //关单
            OrderEntity update = new OrderEntity();
            update.setId(entity.getId());
            update.setStatus(OrderStatusEnum.CANCLED.getCode());
            this.updateById(update);
            OrderTo orderTo = new OrderTo();
            BeanUtils.copyProperties(orderEntity,orderTo);
            //发给MQ一个
            try {
                //TODO 保证消息一定会发送出去,每一个消息做好日志记录
                rabbitTemplate.convertAndSend("order-event-exchange", "order.release.other", orderTo);
            }catch (Exception e){
                //TODO 将没发送成功的消息进行重试发送
            }
        }
    }

    @Override
    public PayVo getOrderPay(String orderSn) {
        PayVo payVo = new PayVo();
        OrderEntity order = this.getOrderByOrderSn(orderSn);
        BigDecimal decimal = order.getPayAmount().setScale(2, BigDecimal.ROUND_UP);
        payVo.setTotal_amount(decimal.toString());
        payVo.setOut_trade_no(order.getOrderSn());

        List<OrderItemEntity> order_sn = orderItemService.list(new QueryWrapper<OrderItemEntity>().eq("order_sn", orderSn));
        OrderItemEntity entity = order_sn.get(0);
        payVo.setSubject(entity.getSkuName());
        payVo.setBody(entity.getSkuAttrsVals());
        return payVo;
    }

    @Override
    public PageUtils queryPageWithItem(Map<String, Object> params) {
        MemberRespVo memberRespVo = LoginUserInterceptor.loginUser.get();
        IPage<OrderEntity> page = this.page(
                new Query<OrderEntity>().getPage(params),
                new QueryWrapper<OrderEntity>().eq("member_id",memberRespVo.getId()).orderByDesc("id")
        );
        List<OrderEntity> order_sn = page.getRecords().stream().map(order -> {
            List<OrderItemEntity> itemEntities = orderItemService.list(new QueryWrapper<OrderItemEntity>().eq("order_sn", order.getOrderSn()));
            order.setItemEntities(itemEntities);
            return order;
        }).collect(Collectors.toList());

        page.setRecords(order_sn);
        return new PageUtils(page);
    }

    /**
     * 处理支付宝的支付结果
     * @param vo
     * @return
     */
    @Override
    public String handlePayResult(PayAsyncVo vo) {
        PaymentInfoEntity infoEntity = new PaymentInfoEntity();
        infoEntity.setAlipayTradeNo(vo.getTrade_no());
        infoEntity.setOrderSn(vo.getOut_trade_no());
        infoEntity.setPaymentStatus(vo.getTrade_status());
        infoEntity.setCallbackTime(vo.getNotify_time());
        paymentInfoService.save(infoEntity);
        //修改订单的状态信息
        if(vo.getTrade_status().equals("TRADE_SUCCESS")||vo.getTrade_status().equals("TRADE_FINISHED")){
            String outTradeNo = vo.getOut_trade_no();
            this.baseMapper.updateOrderStatus(outTradeNo,OrderStatusEnum.PAYED.getCode());
        }
        return "success";
    }

    @Override
    public void createSeckillOrder(SeckillOrderTo seckillOrder) {
        //TODO 保存订单信息
        OrderEntity orderEntity = new OrderEntity() ;
        orderEntity.setOrderSn(seckillOrder.getOrderSn());
        orderEntity.setMemberId(seckillOrder.getMemberId());
        orderEntity.setStatus(OrderStatusEnum.CREATE_NEW.getCode());

       BigDecimal multiply =  seckillOrder.getSeckillPrice().multiply(new BigDecimal(""+seckillOrder.getNum()));
       orderEntity.setPayAmount(multiply);
       this.save(orderEntity);

       //TODO 保存订单项信息
        OrderItemEntity orderItemEntity = new OrderItemEntity() ;
        orderItemEntity.setOrderSn(seckillOrder.getOrderSn());
        orderItemEntity.setRealAmount(multiply);
        //TODO 获取当前sku的详细信息进行设置 productFeignService.getSpuInfoBySkuId()
        orderItemEntity.setSkuQuantity(seckillOrder.getNum());

        orderItemService.save(orderItemEntity);
    }

    /**
        String redisToken = redisTemplate.opsForValue().get(OrderConstant.USER_ORDER_TOKEN_PREFIX + memberRespVo.getId());
        if(orderToken!=null && orderToken.equals(redisToken)){
            //令牌验证通过
            redisTemplate.delete(OrderConstant.USER_ORDER_TOKEN_PREFIX + memberRespVo.getId());
        }else{

        }
         */

    //保存订单数据
    private void saveOrder(OrderCreateTo order) {
        OrderEntity orderEntity = order.getOrder();
        orderEntity.setModifyTime(new Date());
        this.save(orderEntity);
        List<OrderItemEntity> orderItems = order.getOrderItems();
        orderItemService.saveBatch(orderItems);
    }

    private OrderCreateTo createOrder(){
        OrderCreateTo createTo = new OrderCreateTo();
//        生成订单号
        String orderSn = IdWorker.getTimeId();
//        创建订单
        OrderEntity orderEntity = buildOrder(orderSn);

//        获取所有到的订单项
        List<OrderItemEntity> itemEntities = buildOrderItems(orderSn);
        //验价,计算价格相关
        computePrice(orderEntity,itemEntities);
        createTo.setOrder(orderEntity);
        createTo.setOrderItems(itemEntities);
        return createTo ;
    }

    private void computePrice(OrderEntity orderEntity, List<OrderItemEntity> itemEntities) {
        BigDecimal total = new BigDecimal("0.0");
        BigDecimal coupon = new BigDecimal("0.0");
        BigDecimal integration = new BigDecimal("0.0");
        BigDecimal promotion = new BigDecimal("0.0");
        BigDecimal gift = new BigDecimal("0.0");
        BigDecimal growth = new BigDecimal("0.0");
        //订单的总额，叠加每个订单项的总额
        for (OrderItemEntity entity : itemEntities) {
            coupon = coupon.add(entity.getCouponAmount());
            integration = integration.add(entity.getIntegrationAmount());
            promotion = promotion.add(entity.getPromotionAmount());
            total = total.add(entity.getRealAmount());
            gift = gift.add(new BigDecimal(entity.getGiftIntegration().toString()));
            growth = growth.add(new BigDecimal(entity.getGiftGrowth().toString()));
//        订单的价格相关
            orderEntity.setTotalAmount(total);
            //设置应付总额
            orderEntity.setPayAmount(total.add(orderEntity.getFreightAmount()));
            orderEntity.setPromotionAmount(promotion);
            orderEntity.setIntegrationAmount(integration);
            orderEntity.setCouponAmount(coupon);
            //设置积分等信息
            orderEntity.setIntegration(gift.intValue());
            orderEntity.setGrowth(growth.intValue());
            orderEntity.setDeleteStatus(0);
        }
    }

    private OrderEntity buildOrder(String orderSn) {
        MemberRespVo respVo = LoginUserInterceptor.loginUser.get();
        OrderEntity orderEntity = new OrderEntity();
        orderEntity.setOrderSn(orderSn);
        orderEntity.setMemberId(respVo.getId());

        OrderSubmitVo submitVo = confirmVoThreadLocal.get();
        //        获取收货地址
        R fare = wmsFeignService.getFare(submitVo.getAddrId());
        FareVo fareResp = fare.getData(new TypeReference<FareVo>() {
        });
//        设置收货人信息
        BigDecimal fare1 = fareResp.getFare();
        orderEntity.setFreightAmount(fare1);

        orderEntity.setReceiverCity(fareResp.getAddress().getCity());
        orderEntity.setReceiverDetailAddress(fareResp.getAddress().getDetailAddress());
        orderEntity.setReceiverProvince(fareResp.getAddress().getProvince());
        orderEntity.setReceiverName(fareResp.getAddress().getName());
        orderEntity.setBillReceiverPhone(fareResp.getAddress().getPhone());
        orderEntity.setReceiverPostCode(fareResp.getAddress().getPostCode());
        orderEntity.setReceiverRegion(fareResp.getAddress().getRegion());

//        设置订单的相关的状态信息
        orderEntity.setStatus(OrderStatusEnum.CREATE_NEW.getCode());
        orderEntity.setConfirmStatus(7);
        return orderEntity;
    }

    //构建所有订单项数据
    private List<OrderItemEntity> buildOrderItems(String orderSn) {
        //最后确定每个购物项的价格
        List<OrderItemVo> currentUserCartItems = cartFeignService.getCurrentUserCartItems();
        if(currentUserCartItems !=null && currentUserCartItems.size()>0){
            List<OrderItemEntity> itemEntities = currentUserCartItems.stream().map(cartItem -> {
                OrderItemEntity itemEntity = buildOrderItem(cartItem) ;
                itemEntity.setOrderSn(orderSn);
                return itemEntity;
            }).collect(Collectors.toList());
            return itemEntities ;
        }
        return null;
    }
    //构建某一个订单项
    private OrderItemEntity buildOrderItem(OrderItemVo cartItem){
        OrderItemEntity itemEntity = new OrderItemEntity();
//        订单信息 商品的spu信息
        Long skuId = cartItem.getSkuId();
        R r= productFeignService.getSpuInfoBySkuId(skuId);
        SpuInfoVo data = r.getData(new TypeReference<SpuInfoVo>() {
        });
        itemEntity.setSpuId(data.getId());
        itemEntity.setSpuBrand(data.getBrandId().toString());
        itemEntity.setSpuName(data.getSpuName());
        itemEntity.setCategoryId(data.getCatalogId());
// 商品sku信息
        itemEntity.setSkuId(cartItem.getSkuId());
        itemEntity.setSkuName(cartItem.getTitle());
        itemEntity.setSkuPic(cartItem.getImage());
        itemEntity.setSkuPrice(cartItem.getPrice());
        String s = StringUtils.collectionToDelimitedString(cartItem.getSkuAttr(), ";");
        itemEntity.setSkuAttrsVals(s);
        itemEntity.setSkuQuantity(cartItem.getCount());
        // 优惠信息（不做） 积分信息
        itemEntity.setGiftGrowth(cartItem.getPrice().multiply(new BigDecimal(cartItem.getCount().toString())).intValue());
        itemEntity.setGiftIntegration(cartItem.getPrice().multiply(new BigDecimal(cartItem.getCount().toString())).intValue());

//        订单项的价格信息
        itemEntity.setPromotionAmount(new BigDecimal("0"));
        itemEntity.setCouponAmount(new BigDecimal("0"));
        itemEntity.setIntegrationAmount(new BigDecimal("0"));
        //当前订单项到的实际金额。总额-各种优惠
        BigDecimal orign = itemEntity.getSkuPrice().multiply(new BigDecimal(itemEntity.getSkuQuantity().toString()));
        BigDecimal subtract = orign.subtract(itemEntity.getCouponAmount())
                .subtract(itemEntity.getPromotionAmount())
                .subtract(itemEntity.getIntegrationAmount());
        itemEntity.setRealAmount(subtract);
        return itemEntity;
    }
}